Tuesday, August 27, 2013

Classic brain teaser


White to move and win.

Source: Kling, 1852

18 comments:

Yancey Ward said...

Probably a better puzzle if it had a less obvious first move. I really didn't expect it to actually lead to a won position, but basically you have to look it over anyway:

1. ab8Q Qb8

White queened with check, so black really must take at b8. Continuing:

2. Rd2

This is not the solution, but is an obvious continuation to study. I could see immediately that it wasn't likely to work for a win, but let's outline the two main problems:

2. .....Kh1!

The only move. I didn't really look long at the alternatives since they were so clearly losing. Continuing:

3. Bd6

White can't take at f3 since black king is trapped on h1 and black can just immediately capture at g8. Continuing:

3. .....Qa7 (best or not?)
4. Kf6 Qa1
5. Be5 Qe1

And I won't bother going further in this line. I can't find any line after move 3 where white can get the pieces coordinated in time to save enough of them to win this game against the queen and bishop. This has to be a draw with proper play.

However, it isn't hard to see how white can force a won ending at move 2, though that ending isn't trivial for most players:

1. ab8Q Qb8
2. Bd6! Qd6 (nothing better here)
3. Rd2! Qd2
4. Nf3

And, now, white will have the difficult task of mating with the king, bishop, and knight. I have to believe this is the solution since it would not be much of a problem if it had this as a secondary solution.

Anonymous said...

1. axbQ+ Qxb8
2. Bd6+ Qxd6
3. Rxd2+ Qxd2
4. Nxf3+ K moves
5. Nxd2
Then mate with Knight and Bishop.

Anonymous said...

It should say: White to win ALL of the material and mate in about 30 moves!!

Cortex said...

If you don't know what a double attack is, here are some...

Source later!

Lorfa said...

Wow!! What a beautiful problem!

I can't believe I found the solution in a few minutes. I was incredibly lucky because my average solve time on this site is like 30 min+.

White is down a queen but can force black's queen into this unbelievable sequence.

axb8=Q+ QxQ Bd6+ Qxd6 Rxd2+ Qxd2 Nxf3+

Daniel said...

1. b8+ Qb8
2. Bd6+ Qd6
3. Rd2 Qd2
4. Qf3+ and the black's game is over...
This problem is very nice! I'm proud to solve it!

Anand Gautam said...

I don't think I can checkmate with only a Bishop and Knight, but technically here is a win for White:
1. axb8=Q+! Qxb8 (forced)
2. Bd6+!! Qxd6 (forced)
3. Rxd2+! Qxd2 (forced)
4. Nxf3+ K**
5. Nxd2 1-0

Anonymous said...

Ok, where do we check the solution? Cause the solution I got does not does not looks winning outright.

Anonymous said...

Ok, where do we check the solution? Cause the solution I got does not does not looks winning outright.

Anonymous said...

Ok, where do we check the solution? Cause the solution I got does not does not looks winning outright.

Anonymous said...

Win rook, lose Queen, lose Bishop, win Bishop, lose Rook, win Bischop, win Queen...and i would guess mate in 32?

Huu Hoang Dinh said...

Here is my solution:
1. axb8=Q+ Qxb8 2. Bd6+ Qxd6 3. Rxd2+ Qxd2 4. Nxf3+ Kg2 5. Nxd2...

poetography de said...

Bishop D6 Check

Queen have to take on E 6 cause otherwise Rook B 8 is lost

than

Rook D 2 Check

Queen has to take Rook D2

than Knight F 3 Check and wins Queen and Game by Material Domination

poetography de said...

Bishop D6 Check

Queen have to take on E 6 cause otherwise Rook B 8 is lost

than

Rook D 2 Check

Queen has to take Rook D2

than Knight F 3 Check and wins Queen and Game by Material Domination

poetography de said...

Bishop D6 Check

Queen have to take on E 6 cause otherwise Rook B 8 is lost

than

Rook D 2 Check

Queen has to take Rook D2

than Knight F 3 Check and wins Queen and Game by Material Domination

Prof.S.G.Bhat said...

1.axb8=Q+ Qxb8
2.Bd6+ Qxd6
3.Rxd2+ Qxd2

(2.... K moves
4.Rxd6.With R&B vs.B of same colour it is win for white.)
4.Nxf3+ K moves
5.Nxd2
With B&N it is a technical win for white

Anonymous said...

You know haow to checkmate with K+B+N vs K ?

Well, you ought to since this is part of the solution from which this is the main line:

1. axb8Q+ Qxb8
2. Bd6+ Qxd6
3. Rxd2+ Qxd2
4. Nxf3+ K any
5. Nxd2

leaving the mentioned endgame on the board which ich of course a win for white.

Yancey Ward said...

To the anonymous commenter at 8:03 PM CDT,

Yeah, by my count and using the Nalimov table base, mate in 31.